Leather wrist-watch strap and method of manufacturing it



April 7, 1931. A. H. sAuER. JR-

LEATHER WRIST WATCH STRAP AND METHOD OF MANUFACTURING IT Filed May 28, 1930 NEW WHY OLD WAY INVENTOR.

-- l-IsauerJn- ATTORNEY.

Patented Apr. 7, 1931 ALBERT H. SAUER, JR, OF CINCINNATI, OHIO LEATHER waisr-waren smear AND nnrnon or nanoracruame I'l Application filed May 28 1930: Serial No. 456,499.

My invention relates to leather wrist watch straps of the two-ply variety.

The object of my invention is to provide a strap of this type which is of simple and economical construction and which is so constructed at the tip or free end as to be very durable.-

Other objects and advantages of the invention will be evident upon a full understand- 10 ing of the method of construction and arrangement of parts as hereinafter more fully set forth.

Myl invention consists in providinga wrist watc strap comprising two superposed plies 18 of leather, or similar material, suitably secured together throughout its length, said plies being integrally formed" at the tip end and preferably integrally formed at the other end, one of said plies being spliced between 20 its ends by anoverlapping joint preferably having the overlapping portions beveled or 1 tapered. y

My invention also consists in the method or process of producing the strap and in the details of construction and arrangement, as herein set forth and claimed.

One form ofthe. invention is herein presented for the purpose of exemplification but it will be understood that the invention is also susceptible of embodiment in other modified forms coming equally within the scope of the claims.

In the accompanying drawing Fig. 1- 's a plan view of a piece of leather folded in accordance with the invention, the

broken lines indicating the manner in which the watch straps are cut ,or blanked therefrom, the right hand portion of the figure showing one strap disconnectedor severed from the leather stock and stitched;

Fig. 2 is an edge view of the leather stock shown in Fig. 1, illustrating the overlapping joint and its approximate location;

Fig. 3 is a perspective view of a strap blanked from the stock fore being stitched, with the overlapping joint portions slightly separated;

Fig. 4 is a perspective view of a. completed two-ply leather wrist watch strap formed in accordance with the invention;

shown in Fig. 1, be-' Fig. 5 is a similar perspective viewof a finlshed two-ply leather wrist watch strap,

as previously manufactured;

Fig. 6 is a plan view of a strap constructed according to-the present invention and shown as it would appear if the plies were unfolded;

Fig. 7 is a similar view of a strap made in the old way; I I i Fig. 8 illustrates the manner in which the tapered end of the stra can be varied in shape without afi'ecting t eprinciple of that portion of my invention which relates to the tip of the strap; and

Fig. 9 is a plan view showing a modification.

. Heretofore in the making of leather wrist watch straps of the two-ply type or variety,

it has been the practice to fold the leather stock at a point adjacent the pin bar 100 only, then stamp or blank out the strap an then sew the blank together in such a manner as to provide the pin bar loop, leaving the plies of the tapered end of the strap attached 1 together by stitching only and not integrally 7 of leathgr stock 3 and shaveor skive the leather to a point on one side along one edge 4 and also shave or skive it to a point on the opposite side along the opposite edge 5 so that each of said opposite edges is tapered or beveled to a point. I then a ply adhesive material to one side of t e leather stock and fold it twice so that said tapered ed e portions overlap each other be tween the olded edges and form a joint 6 as shown in Fig.2. I then compress the adhesive material between the folded stock, including the overlapping portions forming the joint 6 between the folds 7 and 8. With the plies of the leather 3 thus folded and glued and the longitudinal edges overlapped and i glued together, as above described, I then cut or blank out the individual straps as shown by broken lines 9 of Fig. 1, thereby producing a leather wrist Watch strap having two superposed plies 9 and 10 integrally connected together at each end. The final operation is that of stitchingthe plies together adjacent their edges, as shown in Fig. 4, the stitching 12 being somewhat spaced apart from the fold 7 of the strap so as to provide the pin bar loop 13.

In use the free tapered end of the strap is repeatedly passed or threaded through the metal buckle and leather keepers and when the strap is made in the old way, as illustrated in Fig. 5, with the plies not integrally formed at the free tapered end butmerely stitched together, after some use the threads orstitching wear out to such an extent that the plies at the tip end of said strap separate, thereby resulting in difiicult and troublesome insertion into the buckle and leather keepers and when thus separated they are unsightly and the separate plies become frayed to such an extent that a new strap is necessary, although the remainder of the strap is in good condition: However, with my invention having the plies integrally formed and connected at the tip and where the most severe use and wear occurs, the foregoing objections are completely overcome and the entire strap wears evenly and uniformly, thereby greatly increasing the longevity of the strap.

In Fig. 8 I have illustrated various shapes which can be given to the free end of the strap formed in accordance with my invention but any other shapes can be used with the exception of an end that tapers to an exact point.

It may be stated that the blunter the free end of the strap is made the more secure the two plies at this end are joined together, as will be apparent to those understanding the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. As an article of manufacture, a leather wrist watch strap comprising a plurality of plies of superposed leather, the ends of said plies being integrally formed, one of said plies having a joint between said integrally formed ends, and said plies being further secured together by stitching adjacent their longitudinal edges.

2. As an article of manufacture, a leather wrist watch strap comprising a plurality of plies of superposed leather adhesively secured together, the ends of said plies being integrally formed and connected together, one of said plies having a joint between said integrally formed ends and said plies being further secured together by stitching adjacent their longitudinal edges and near one end in such a manner as to provide a loop between said plies at said end. i

3. As an article of manufacture, a leather wrist watch strap comprising a plurality of plies of superposed leather adhesively secured together, the ends of said plies being integrally formed and connected together, and said plies being further secured together by stitching in such a manner as to provide a loop therebetween at one end, the opposite end of each ply being tapered.

4. As an article of manufacture, a leather wrist watch strap comprising a plurality of plies of superposed leather having the ends thereof integrally formed, one of said plies having a joint between said integrally formed ends, and said plies being suitably secured to gether between said ends.

5. As an article of manufacture, a leather wrist watch strap comprising a plurality of superposed plies of leather having the ends thereof integrally formed, one of said plies having an overlapping joint between its ends, and means for holding said plies together between the ends.

6. The method of manufacturing a leather wrist watch strap which consists in folding a strip of leather upon itself to form superposed plies with two end folds and with a joint in one ply between said folds, and then stitching said plies together in such a manner as to provide a loop therebetween adjacent one end.

7. The method of manufacturing leather wrist watch straps which consists in folding a strip of leather upon itself to form superposed plies with two end folds and applying adhesive substance therebetween with a joint in one ply between the folds, and then stitching said plies to ether in such a manner as to provide a loop t erebetween at one end.

8. The method of manufacturing leather wrist watch straps which consists in forming two folds therein whereby opposite edges are brought into overlapping joint relation between said folds, and then permanently securing said superposed plies together between the ends of said strap.

9. The method of forming two-ply leather wrist watch straps which consists in twice folding a piece of leather to bring two opposite edges thereof into overlapping relation to form a joint in one ply between said folds, then dieing out individual straps from said folded leather one end of each strap being preferably somewhat tapered, and then stitching the plies of said strap together adjacent their longitudinal edges and across the wider end portion in spaced apart relation from said end to provide a loop therein.

10. The method of manufacturing leather wrist watch straps which consists in taperin two opposite edge portions of astrip 0 leather, then applying adhesive material to one side of said strip, then folding said strip to form it into two superposed plies with the tapered edge portions overlapping each other to form a joint between the folds, then compressing said plies together upon said adhesive material, and then dieing out the individual strap whereby one end is formed tapering.

11. The method of manufacturing leather wrist watch straps which consists in tapering 1 two opposite edge portions of a strip of leather, when applying adhesive material to one side of said strip, then folding said strip to form it into two superposed plies with the v tapered edge portions overlappin each other to form a joint between the fol s, then compressing said plies together upon said adhesive material, then dieing out the individual straps whereby one end of each strap is formed tapering, and then stitching said pcllies together adjacent their longitudinal e es.

%2. The method of manufacturin leather wrist watch straps which consists 1n tapering two opposite edge portions of a strip of leather, then applying adhesive material to one side of said strip, then folding said strip to form it into two superposed plies with the tapered edge portions overlapping each other to form a joint between the folds, then compressing said plies together upon said adhesive material, then dieing out the individual straps whereby one end of each strap is formed tapering, and then stitching said plies together adjacent their longitudinal ed es and in transverse s aced a art relation from the wide end thereo loop,

13. Themethod of forming two-plyleather 'wrist watch straps which consists in folding 40 a piece of leather to form two folds so that the ends of the leather are splice-d or joined between the folds, then dieing out individual straps from said folded and spliced leather, one end of which strap is preferably somewhat tapered, and then stitching the plies of said straps together adjacent their longitudinal edges and near their ends, the stitch adjacent the end opposite the tapered end being spaced from the fold to allow space for the formation of a pin bar loop between said plies, and said splices on the jointed ply being securely joined during the stitching of the straps.

ALBERT H. SAUER, JR.

to form the pin bar Eiti 

